Skip to the content

Delidded: CPU mods, cooling and old PCs that still earn their keep

The LGA 771 to 775 Xeon mod

Run a 45 nm Xeon in a Core 2 board: what the adapter sticker does, which chipsets cope, and how to get through the BIOS side. Five pages, in order:

  1. Motherboard compatibility
  2. Choosing a Xeon
  3. Step-by-step instructions
  4. Troubleshooting

Start with page 1 »

Latest builds

Every build, newest first »

BIOS, microcode and CPU lists

Modkit calculators

LGA 771 compatibility checker

Pick a Xeon and your chipset, get a pass or check strip.

FSB overclock calculator

Core clock, bus rating and memory speed from FSB and ratio.

Cooler TDP headroom

Estimate overclocked heat against a cooler rating.

PC power supply calculator

Add up an old build and pick a sensible supply size.

Parts bin picks

Parts links can earn us a commission. As an Amazon Associate I earn from qualifying purchases.

  • SPI flash

    CH341A programmer kit with SOIC8 clip and 1.8 V adapter

    Reads and writes 25-series SPI BIOS chips; check the 5 V signal-level issue first.

    $13.99 Amazon price, checked October 18, 2026, 3:26 PM MDTGrab it on Amazon
  • Cooler

    Thermalright Peerless Assassin 120 SE

    A dual-tower air cooler for current Intel and AMD sockets.

    $31.41 Amazon price, checked October 18, 2026, 3:26 PM MDTGrab it on Amazon
  • Socket mod

    X-Acto #1 precision knife

    A thin, replaceable blade for trimming the two plastic key tabs flush with the socket wall.

    $7.99 Amazon price, checked October 18, 2026, 3:25 PM MDTGrab it on Amazon
  • Cleanup

    Amazon Basics 99% isopropyl alcohol

    High-purity alcohol that dissolves old paste and dries without residue.

    $5.94 Amazon price, checked October 18, 2026, 3:26 PM MDTGrab it on Amazon

Product prices and availability are accurate as of the date/time indicated and are subject to change.

Open the whole parts bin »

Web design notes

Beginner lessons with code you can paste and run: the CSS tutorial (two small projects), the JavaScript tutorial and an online HTML editor to try them in.